Jun 09 2026
Restaurants›Jimmy Buffett's Margaritaville›Mushroom Havarti Burger Recipe

Mushroom Havarti Burger Recipe

Inspired by Jimmy Buffett's Margaritaville
Time45m
Serves4

Our signature patty topped with a marinated portobello mushroom cap, sautéed onions, Havarti cheese and sweet onion and garlic aioli. Add bacon for an additional cost

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Ingredients

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Burger Patty

Mushroom Topping

Sautéed Onions

Aioli

Assembly

Method

Burger Patty Preparation

  1. 1

    Mix the Patty Ingredients

    In a mixing bowl, combine ground beef, salt, black pepper, garlic powder, and onion powder. Mix until just combined, being careful not to overwork the meat.

  2. 2

    Form the Patties

    Divide the mixture into four equal portions and form each portion into a patty. Make a slight indentation in the center of each patty to help them cook evenly.

Mushroom Topping Preparation

  1. 3

    Marinate the Mushrooms

    In a shallow dish, combine soy sauce, olive oil, and balsamic vinegar. Add the portobello mushrooms and marinate for at least 15 minutes.

  2. 4

    Grill the Mushrooms

    Preheat a grill or grill pan over medium-high heat. Grill the marinated mushrooms for about 5 minutes on each side, or until tender.

Sautéed Onions Preparation

  1. 5

    Sauté the Onions

    In a skillet, heat olive oil over medium heat. Add the sliced onion and sauté for 5-7 minutes, or until the onions are golden brown and caramelized.

Aioli Preparation

  1. 6

    Make the Aioli

    In a bowl, mix mayonnaise, minced garlic, sweet onion, and lemon juice until smooth. Adjust seasoning to taste.

Burger Assembly

  1. 7

    Assemble the Burger

    Toast the burger buns lightly. On each bottom bun, add a lettuce leaf, followed by the cooked burger patty, grilled portobello mushroom, sautéed onions, and a slice of Havarti cheese. Drizzle with sweet onion and garlic aioli before topping with the other half of the bun.

  2. 8

    Optional Bacon

    If desired, cook the bacon until crispy and add a slice to each burger before closing with the top bun.

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